Basf Aktiengesellschaft

Basf Se Corporation

Klaus-Peter Pfaff

Martin Haubner

Volkmar Menger

Rolf Pinkos

Stephan Schlitter

Stefan Käshammer

Juergen Schubert

Guenther Gottwald

Michael Hesse

Ekkehard Schwab

Joachim Paust

Klemens Massonne

Christoph Sigwart

Horst Hartmann

Lothar Franz

Michael Slany

Anton Meier

Andreas Walch

Peter Groll

Lucia Koenigsmann

Martin Kamasz

Arthur Höhn

Achim Gerstlauer

Günther Gottwald

Michael Schwarztrauber

Jürgen Schubert

Lucia KÖNIGSMANN

The present invention relates to a process for the preparation of cis-2-(2-methylprop-1-enyl)-4-methyltetrahydropyran comprising the catalytic hydrogenation of 2-(2-methylprop-1-enyl)-4-methylenetetrahydropyran in the presence of hydrogen and a heterogeneous catalyst comprising ruthenium on a support and subsequently bringing the compounds obtained in this way into contact with a strongly acidic cation exchanger.

Method for producing cis-rose oxide

A process for obtaining oligomers of polytetrahydrofuran or of tetrahydrofuran copolymers from a methanolic crude product which contains polytetrahydrofuran or tetrahydrofuran copolymers and is obtained in the transesterification of the mono- and/or diesters of polytetrahydrofuran or tetrahydrofuran copolymers with methanol, which includes a) removing the majority of the methanol from the crude product in a first distillation stage, b) separating the resulting bottom product by distillation into a top fraction containing the oligomers of polytetrahydrofuran or of tetrahydrofuran copolymers, and polytetrahydrofuran or tetrahydrofuran copolymer, and c) condensing the oligomers of polytetrahydrofuran or of tetrahydrofuran copolymers out of the top fraction from stage b).

Method for obtaining oligomers of polytetrahydofurane or tetrahydrofurane

The present invention relates to a process for preparing &#x3b1;-bisabolol, comprising the reaction of farnesol in the presence of a ketone, of a sulfonic acid and of a further strong acid.

Method for producing &#x3b1;-bisabolol from farnesol

The present invention provides a process for preparing mono- or diesters of polytetrahydrofuran or of tetrahydrofuran copolymers by polymerizing tetrahydrofuran in the presence of at least one telogen and/or of a comonomer over an acidic catalyst, wherein the polymerization reactor is started up using a mixture of polytetrahydrofuran, the mono- or diesters of polytetrahydrofuran and/or of the THF copolymers, tetrahydrofuran, any comonomer and at least one carboxylic acid and/or one carboxylic anhydride.

Method for producing monoesters and diesters of polytetrahydrofuran and of tetrahydrofuran copolymers

The invention relates to a process for the continuous preparation of THF by reaction of a 1,4-butanediol-containing reaction mixture over a heteropolyacid catalyst which has not been predried, wherein the reaction mixture comprises 2-(4-hydroxybutoxy)tetrahydrofuran.

Method for producing tetrahydrofuran

In a process for preparing polytetrahydrofuran, tetrahydrofuran copolymers, diesters or monoesters of these polymers having a low color number, the polymers obtained by cationic polymerization of tetrahydrofuran are hydrogenated in the presence of a macroporous, supported heterogeneous catalyst comprising at least one metal of groups 7 to 10 of the Periodic Table of the Elements as active metal.

Method for the production of polytetrahydrofuran with low color index

Sugar ketals are prepared by reacting a sugar with a ketone in the presence of an acid catalyst by a process in which

Preparation of sugar ketals

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Friedelsheim, Germany

Klaus-Peter Pfaff